Online PHP editor | refs for 78qjW

<?php $subject = array( array("Yolo" => "Swag", 2, 3), array("Thwag" => "Molo", 2, 4), array("Yolo" => "Thwag", 2, 3) ); $unique = array_reduce($subject, function($final, $article){ static $seen = array(); if ( ! array_key_exists($article[2], $seen)) { $seen[$article[2]] = NULL; $final[] = $article; } return $final; }); print_r($subject); print_r($unique);